net.c: Fix a doxygen warning and trivial coding style cleanups.

net.c: Fix a doxygen warning and trivial coding style cleanups.

No functional changes. Fixes the following doxygen warning:

	Warning: documented function `getsockname for local or fn getpeername' was not declared or defined.

Cosmetic cleanups include:

	- Reduce line width to 80 chars in most cases.
	- Replace @param by \param.
	- Replace tabs by spaces.